question about DARCS token replacement

Thomas Lord <[email protected]>
Newsgroups gmane.comp.version-control.arch.user
Message-ID <[email protected]> 
Is anyone familiar enough with DARCS to speak to the
issue of whether token-replace patches are accurately
invertible and, if so, how?    Naively:

       s/foo/bar

is not the inverse transform of:

     s/bar/foo

-t
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